深水复合泡沫压缩性能试验与现场应用  

Compressibility Test and Field Application of Crushable Syntactic Foam in Deep Water

作　　者：胡志强 曹耐[1,3] 张亢 李舒展 李鑫 金鑫[1,3] HU Zhi-qiang;CAO Nai;ZHANG Kang;LI Shu-zhan;LI Xin;JIN Xin(SINOPEC Research Institute of Petroleum Engineering, Beijing 100101, China;College of Safety and Ocean Engineering, China University of Petroleum, Beijing 102249, China;State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100101, China)

机构地区：[1]中国石油化工股份有限公司石油工程技术研究,北京100101 [2]中国石油大学(北京)安全与海洋工程学院,北京102249 [3]页岩油气富集机理与有效开发国家重点试验室,北京100101

出　　处：《科学技术与工程》2021年第30期12925-12929,共5页Science Technology and Engineering

基　　金：中国博士后科学基金(2020M670584);中国石化科技攻关项目(P20072-3,PE19009-1)。

摘　　要：深水油气井生产测试阶段采用复合泡沫材料技术能有效减缓环空热膨胀压力上升,保护管柱结构不受损坏,因此开展针对复合泡沫材料压缩性能的研究具有重要意义。根据Gibson模型中的多孔材料力学行为理论,对试制的复合泡沫材料进行压缩力学特征预测,在准静态单轴压缩试验和静水压压缩试验中,复合泡沫材料压缩过程中呈现出线弹性变形、屈服破坏和致密化压缩三个阶段的力学特征。分析了泡沫材料在不同配比、温度条件下的体积压缩率随静水压力的变化规律。结果表明:理论预测与试验结果基本一致,静水压力下的泡沫材料的启动压力要大于单轴压载屈服强度;环境温度对泡沫材料的体积压缩率影响不大,但会改变泡沫材料启动压力,随着温度的升高,启动压力会相应降低;不同微珠填充量对材料性能影响较大,随着空心玻璃微珠含量的增高,泡沫材料启动压力降低,体积压缩率增大。在案例井的现场应用中,证实了采用复合泡沫能有效控制环空热膨胀压力,保障管柱安全和井筒完整性。The crushable syntactic foam is able to effectively slow down annulus pressure buildup and protect casing structure in the production phase of the deepwater oil and gas well,it is of great significance to study the compressibility of crushable syntactic foam.According to the theory of the porous material mechanics behavior of Gibson model,the compression characteristics of the crushable syntactic foam were predicted,the three phases of linear elastic deformation,yield damage and densification were presented in the process of syntactic foam compression.The variation of the volume compressibility of syntactic foam in different proportions of Hollow glass microspheres and temperature conditions was analyzed.The results figure out that the theoretical predictions and the experimental data are basically identical,foam crushable pressure under hydrostatic pressure is greater than the yield strength of quasi-static compressive tests.The experimental temperature has no influence on foam volume but change the crush pressure.With the increasing of experimental temperature,crush pressure of syntactic foam will be reduced accordingly,and with the increasing of content of hollow glass microspheres,foam crush pressure will be reduced and volume compression ratio increases.In the field application of the case well,it is proved that the crushable syntactic foam can effectively control the annulus thermal expansion pressure and ensure the well integrity.

关 键 词：深水 复合泡沫 环空压力 性能试验 压缩性能 现场应用 

分 类 号：TE38[石油与天然气工程—油气田开发工程]